一种新结构频率域重叠数字滤波器

A Novel Overlapping Digital Filter in Frequency Domain

本文利用重叠数字滤波理论,给出一种新的频率域重叠结构滤波器,该滤波器具有优良的传输特性,通带波动很少而且具有较大的阻带衰减。运用此结构文中编程实现了低通、带通和高通滤波器的设计,物理意义明确。通过对滤波器特性的理论分析给出了加窗序列改进方案,基本消除了通带和阻带内的波动。

Based on overlapping digital filtering theory, a novel frequency domain overlapping filter is proposed. This filter possesses excellent transmission characteristics such as stable pass-band and greater stop-band attenuation. Low pass, band pass and high pass filters have been designed based on this filter architecture. In-depth physical meaning is deduced through theoretical analysis on the characteristics of the proposed filter. As the result, an improved scheme is derived to eliminate the pass-band and stop-band fluctuations by means of windowed series.